I tried asking this question in several forums but didn't find any answers as i expected. It's very hard to find information about halbach array in google, especially in the electromagnetic field.
We know that Halbach array works well with a permanent magnet by giving a strong magnetic field in one side and weak on the other side.
I'm thinking to design solenoid in halbach arrangement to give a strong magnetic field in one side and weak in the other. We know that solenoid behave similarly to permanent magnet. My question what happens when we give alternative current or pulsed dc to solenoid coil? Will the direction change in magnetic field? I know pulsed dc doesn't change in magnetic field? Will this be a problem to achieve halbach array? kindly advise.